Eichaed thomson sylvester



(No Model.)

B. T. SYLVESTER.

NUT LOOK.

No. 366,436. Patented July 12, 1887 UNITED STATES PATENT OFFICE.

RICHARD THOMSON SYLVESTER, OF ROSENFELD, MANITOBA, CANADA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 366.436, dated July 12, 1887. Application filed January 25, 1887. Serial No. 225,470. (No model.) Patented in Canada Novemberll, 1886, No. 25.339.'

To all whom it may concern:

Be it known that I, RICHARD THoMsoN SYLVEsTER, a citizen of Canada, residing at Rosenfeld, in the county of Manchester, and

in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Nut-Locks, (for which I have obtained a patent in Canada, No. 25,339, bearing date November 11, 1886,) of which the following is a specification.

My improved nut-lock is made preferably of spring-steel, but may be made of any other equally strong and fixible material. In placing the lock between two nuts a tongs (shown in drawings) is used, and by means of which the shoulder ends of the lock are so 00111- pressed that it may be forced between the two nuts, after which the tongs is removed and the shoulders of the lock allowed to spring against the nuts.

In the accompanying drawings, which illustrate my invention, Figure 1 is a face view of the lock. Fig. 2 is a longitudinal section of the same on line at .r, and also showing the tongs for applying the same. Fig. 3 shows the look as applied to a railway-rail joint. Fig. 4 shows a modification of the lock as shown in the foregoing figures, having slots formed in it for receiving and holding the corners of the nuts.

In its normal shape and when not sprung into position, as when in use, the body A of the lock is bowed outward between its two shoulders, B, as shown in Fig. 2. The shoulders B are splayed outward, being farther apart at their angles a,'where they join the flanges C, than at their angles 1), where they join the body A. These shoulders are made equal in length to the thickness of the nuts, so that the flanges C will lie closely against the outsides of the nuts when the angles I) are held against the fish-plate D. In each of the flanges G a slot, E, is made, extending from near the angle a toward the outer end'of the flange. The outer and opposite corners of the flanges bounding these slots are rounded out, as shown in Fig. 1, so as to fit part way around the projectingends of the bolts. The spring of the body A holds these concave 50 edges F in between the screw-thread on the projecting ends of the bolts, and thereby prevents the nut-lock from slipping out of place.

In the lock shown in Fig. 4 slots 9 are made in the shoulders, and are for the purpose of taking over the corners of nuts when necessary, so that with this lock the nuts may be set either face to face, corner to face, or corner to corner. These slots 9 are extended for some distance along the body A, by which the body is not left too stifi' for the shoulders.

In setting the nut-lock in place, the tongs II is used, the nibs i grasping the inner ends of the slots E and springing the shoulders inward, so that the lock may be pressed back between the nuts. The tongs is then removed, and the shoulders are allowed to spring outward and hold the ends of the flanges between the threads of the bolt-screw.

I do not claim, broadly, an elastic strip of metal bent to bear upon and between two nuts for the purpose of preventing their rotation; but I believe myself to be the first to form a nut-lock as herein described, with the two faces to bear against the nuts, and with the extended notched ends adapted to engage the bolts outside ofthe nuts. Thus constructed, the device may be sprung into position after the nuts are in place and employed in connection with nuts of ordinary form, hearing attheir inner faces closely against a fish-plate or its equivalent.

What I claim as my invention is 1. A nut-lock consisting of a metal strip or band bent twice at the end to form a shoulder at an angle and a flange parallel to the main portion of the strip, the shoulder being slotted to receive the corner of the nut and the flange being slotted to engage the threaded portion of a bolt, substantially as and for the purpose specified.

2. A. nut-lock consisting of a strip or band provided at the ends with shoulders at an angle thereto and flanges at an angle to the shoulders, the said flanges having slots to receive the ends of a manipulating-too], and 5 which terminate in concave edges to grasp the threaded ends of the bolts, substantially as and for the purpose described.

Signed at Morden this 15th day of December, A. D. 1886.

RICHARD THOMSON SYLVESTER.

In presence of- WM. BEECH, DAVID TOBIAS. 

